| 1 | Aba Energy Corporation | | Oil & Gas Operator | Dec 2025 |
| 2 | Allied Energy Corporation | | Oil & Gas Operator | Dec 2025 |
| 3 | Amerada Hess Corp. Unit Operator | | Oil & Gas Operator | Dec 1986 |
| 4 | Amerada Hess Corporation | Houston, TX 77252 | Oil & Gas Operator | Aug 2013 |
| 5 | Anacapa Oil Corporation | | Gas Operator | Dec 2025 |
| 6 | Arco Oil & Gas Company | Plano, TX 75086 | Oil & Gas Operator | Mar 2006 |
| 7 | Arkoma Production Company Of California | | Oil & Gas Operator | Dec 1993 |
| 8 | Armstrong Petroleum Corporation | | Oil & Gas Operator | Dec 2025 |
| 9 | Arthur J. Arding Jr. | | Gas Operator | Dec 1995 |
| 10 | Aspen Exploration Corporation | | Oil & Gas Operator | Dec 2007 |
| 11 | Atlantic Oil Company | | Oil & Gas Operator | Dec 2025 |
| 12 | B. D. & D. Co. | | Gas Operator | Dec 1992 |
| 13 | Black Mountain Oil Co. | | Oil & Gas Operator | Dec 1999 |
| 14 | C & C Minerals LTD | | Oil & Gas Operator | Dec 2019 |
| 15 | California Resources Production Corporation | | Oil & Gas Operator | Dec 2025 |
| 16 | Capitol Oil Corporation | | Oil & Gas Operator | Dec 2025 |
| 17 | Carneros Energy Inc. | | Oil & Gas Operator | Dec 2004 |
| 18 | Casex Company | | Oil & Gas Operator | Dec 2007 |
| 19 | Castle Minerals | | Oil & Gas Operator | Dec 2018 |
| 20 | Channel Exploration Company | | Oil & Gas Operator | Feb 1997 |
| 21 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Apr 2026 |
| 22 | Coastal Oil & Gas Corp | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 23 | Concordia Resources Inc. | | Oil & Gas Operator | Dec 2025 |
| 24 | Crest Oil & Gas Management Corp. | | Oil & Gas Operator | Dec 2025 |
| 25 | Dalen Resources Oil & Gas Co | Dallas, TX 75206 | Oil & Gas Operator | Jun 2010 |
| 26 | Donald C Slawson Expl Co. Inc | | Oil & Gas Operator | Dec 2020 |
| 27 | Dow Chemical Co. | | Oil & Gas Operator | Dec 1997 |
| 28 | E. C. Green | | Gas Operator | Dec 1989 |
| 29 | Enerfin Resources Northwest Limited Partnership | | Oil & Gas Operator | Jan 2022 |
| 30 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | Apr 2026 |
| 31 | Foothill Energy, LLC | Spring, TX 77393 | Oil & Gas Operator | Apr 2026 |
| 32 | G.E.C. Oil And Gas Operations | | Gas Operator | Dec 1984 |
| 33 | Geo Investment Inc. | | Oil & Gas Operator | Dec 2003 |
| 34 | Go Energy Inc. | | Gas Operator | Dec 1987 |
| 35 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 36 | H. T. Hilliard & Co. | | Oil & Gas Operator | Dec 1999 |
| 37 | Hamilton Brothers Oil Co. | Houston, TX 77057 | Oil & Gas Operator | Mar 2015 |
| 38 | Harvest Petroleum Inc. | Frisco, TX 75033 | Oil & Gas Operator | Apr 2026 |
| 39 | Hexadyne Energy Corp. | | Oil & Gas Operator | Dec 2013 |
| 40 | Illini Development Company | | Oil & Gas Operator | Dec 2002 |
| 41 | Instrat Inc. | | Oil & Gas Operator | Dec 1992 |
| 42 | Irani Engineering | | Gas Operator | Dec 1995 |
| 43 | Island Energy Partners LLC | | Gas Operator | Jan 2018 |
| 44 | KC Resources Inc | Snowmass VLG., CO 81615 | Oil & Gas Operator | Jan 2026 |
| 45 | Key Production Company, Inc. | Longview, TX 75606 | Oil & Gas Operator | Feb 2026 |
| 46 | Lario Oil & Gas Company | Odessa, TX 79762 | Oil & Gas Operator | Apr 2026 |
| 47 | Lodi Gas Storage L.L.C. | | Gas Operator | Dec 2025 |
| 48 | Mendell Davis Gas Partners LLC | | Oil & Gas Operator | Dec 2013 |
| 49 | Mobil Oil Corporation | Houston, TX 77210 | Oil & Gas Operator | Dec 2007 |
| 50 | Nahama & Weagant Energy Company | | Oil & Gas Operator | Dec 1997 |
| 51 | National Oil Company | Garden City, KS 67846 | Oil & Gas Operator | Jun 2024 |
| 52 | North Valley Oil & Gas Co. | | Oil & Gas Operator | Dec 1996 |
| 53 | Northwest Petroleum Inc. | | Oil & Gas Operator | Dec 2025 |
| 54 | Output Exploration LLC | | Oil & Gas Operator | Dec 2006 |
| 55 | Pacific Gas And Electric Company | | Gas Operator | Dec 2025 |
| 56 | Pacific Petroleum Technology LLC | | Oil & Gas Operator | Dec 2018 |
| 57 | Pancanadian Petroleum Company | | Oil & Gas Operator | Oct 1989 |
| 58 | Paul Graham Drilling & Service Co. | | Oil & Gas Operator | Dec 2011 |
| 59 | Petersen Production Company LLC | | Oil & Gas Operator | Dec 2019 |
| 60 | Petrogulf Corporation | Denver, CO 80202 | Oil & Gas Operator | Apr 2026 |
| 61 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 62 | Production Specialties Company | | Oil & Gas Operator | Dec 2003 |
| 63 | Quintana Petroleum Corporation | Denver, CO 80265 | Oil & Gas Operator | Mar 1998 |
| 64 | Robert A. Cohan | | Oil & Gas Operator | Jan 2018 |
| 65 | Robert Sumpf | | Gas Operator | Dec 1990 |
| 66 | Romara Energy Inc. | | Oil & Gas Operator | Dec 2017 |
| 67 | Rosetta Resources Operating LP | San Antonio, TX 78216 | Oil & Gas Operator | Apr 2026 |
| 68 | Royale Energy Inc | San Diego, CA 92108-4518 | Oil & Gas Operator | Dec 2025 |
| 69 | S. M. Reynolds Opr. | | Gas Operator | Dec 1990 |
| 70 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2026 |
| 71 | Source Energy Corp. | | Gas Operator | Aug 2022 |
| 72 | Stream Energy, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2025 |
| 73 | Sumpf-Williams | | Gas Operator | Dec 1980 |
| 74 | Tamarack Energy Inc | Midland, TX 79701 | Oil & Gas Operator | Dec 2015 |
| 75 | The Nahabedian Exploration Group LLC | | Oil & Gas Operator | Dec 2025 |
| 76 | The Termo Company | Long Beach, CA 90801 | Oil & Gas Operator | Feb 2026 |
| 77 | TJ Ballantyne Living Trust | | Oil & Gas Operator | Dec 2019 |
| 78 | Tonka Energy Inc. | | Oil & Gas Operator | Dec 2004 |
| 79 | Towne Exploration Company LP | | Oil & Gas Operator | Dec 2025 |
| 80 | Tri-Valley Oil & Gas Co. | | Oil & Gas Operator | Dec 2025 |
| 81 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |
| 82 | Umc Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 83 | Venada National | | Oil & Gas Operator | Dec 2010 |
| 84 | Venoco LLC | | Oil & Gas Operator | Dec 2025 |
| 85 | Vern Jones Oil & Gas Corp. | Sacramento, CA 95825 | Oil & Gas Operator | Dec 2025 |
| 86 | Vernon E. Faulconer | | Oil & Gas Operator | Dec 1996 |
| 87 | Vesta Oil And Gas LLC | | Oil & Gas Operator | Dec 2025 |
| 88 | Vintage Production California LLC | | Oil & Gas Operator | Jun 2016 |
| 89 | Well Water Management | | Oil & Gas Operator | Dec 2025 |
| 90 | Western Metals Corporation | | Oil & Gas Operator | Dec 2025 |